Friendly Company determined the following amounts related to its pensions: Benefits paid to retirees Expected return on plan assets Funding contributions during the year Service cost Investment return Interest cost Plan assets at fair value, January 1 A. What is the net periodic pension cost for the year? B. What is the fair value of the plan assets at December 31? $ 447,250 366,150 478,050 442,100 326,700 480,300 7,327,950 C. Which investment return, expected or actual, does GAAP allow in the calculation of benefit cost? What is the rationale underlying this treatment? D. What factors affect the estimate of a firm's future retirement obligation?